Naresh krish
Published

Interacting With The RAK iTracker Module With BLE Peripheral

The tutorial takes you into the intricacies of the BLE protocol and how to integrate the BLEPeripheral library into the RAK iTracker module.

IntermediateProtip2 hours573
Interacting With The RAK iTracker Module With BLE Peripheral

Things used in this project

Hardware components

RakWireless RAK iTracker
×1
JTAG-HS2 Programming Cable
Digilent JTAG-HS2 Programming Cable
×1
SparkFun FTDI Basic Breakout - 3.3V
SparkFun FTDI Basic Breakout - 3.3V
×1
Jumper wires (generic)
Jumper wires (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)

Story

Read more

Code

Arduin BLE demo

Arduino
// Copyright (c) Sandeep Mistry. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

// Import libraries (BLEPeripheral depends on SPI)
#include <SPI.h>
#include <BLEPeripheral.h>

//custom boards may override default pin definitions with BLEPeripheral(PIN_REQ, PIN_RDY, PIN_RST)
BLEPeripheral                    blePeripheral                            = BLEPeripheral();

// uuid's can be:
//   16-bit: "ffff"
//  128-bit: "19b10010e8f2537e4f6cd104768a1214" (dashed format also supported)

// create one or more services
BLEService service = BLEService("fff0");

// create one or more characteristics
BLECharCharacteristic characteristic = BLECharCharacteristic("fff1", BLERead | BLEWrite);

// create one or more descriptors (optional)
BLEDescriptor descriptor = BLEDescriptor("2901", "value");

void setup() {
  Serial.begin(115200);
#if defined (__AVR_ATmega32U4__)
  delay(5000);  //5 seconds delay for enabling to see the start up comments on the serial board
#endif

  blePeripheral.setLocalName("local-name"); // optional
  blePeripheral.setAdvertisedServiceUuid(service.uuid()); // optional

  // add attributes (services, characteristics, descriptors) to peripheral
  blePeripheral.addAttribute(service);
  blePeripheral.addAttribute(characteristic);
  blePeripheral.addAttribute(descriptor);

  // set initial value
  characteristic.setValue(0);

  // begin initialization
  blePeripheral.begin();
}

void loop() {
  BLECentral central = blePeripheral.central();

  if (central) {
    // central connected to peripheral
    Serial.print(F("Connected to central: "));
    Serial.println(central.address());

    while (central.connected()) {
      // central still connected to peripheral
      if (characteristic.written()) {
        // central wrote new value to characteristic
        Serial.println(characteristic.value(), DEC);

        // set value on characteristic
        characteristic.setValue(5);
      }
    }

    // central disconnected
    Serial.print(F("Disconnected from central: "));
    Serial.println(central.address());
  }
}

BLE peripheral library

Credits

Naresh krish

Naresh krish

22 projects • 64 followers
Maker, Hacker, Guitarist, Full time Android and iOS Dev.

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